which is a better buy 15 oz of popcorn for 1.69 or 30 oz of popcorn for 2.99

Question

which is a better buy 15 oz of popcorn for 1.69 or 30 oz of popcorn for 2.99

Answer 1

Another way of looking at it is the fact that 30 is two times 15 and 2.99 is less than two times 1.69 by far.

So is more economical to buy the 30 oz package than the 15 oz package.

Answer 2

Hi De,

 

A good way to approach this problem is to ask how much each buy costs per oz (i.e. $/oz)

 

The first buy is $1.69/15oz = $0.11/oz

 

The second buy is $2.99/30oz = $0.10/oz

 

It is better to buy 30 oz of popcorn for $2.99 than it is to buy 15oz of popcorn at $1.69.